<?php
    class Settings extends Account {
        private $current_user;

        private $new_username;
        private $new_bio;
        private $new_password;

        private $conn;
        public $error;

        public function __construct($current_user, $conn) {
            parent::__construct($current_user, $conn);
            $this->current_user = $current_user;
            $this->conn = $conn;
        }

        public function getForm($username, $bio, $password) {
            $this->new_username = $username;
            $this->new_bio = $bio;
            $this->new_password = $password;
        }

        public function updateUsername() {
            if ($this->new_username == $this->getDetails("username"))
                return NULL;

            switch(true) {
                case empty($this->new_username):
                    $this->error = "Your username cannot be left blank.";
                    break;
                case preg_match("/[^a-z0-9 ]/i", $this->new_username):
                    $this->error = "Username cannot have any special characters.";
                    break;
                case strlen($this->new_username) > 16:
                    $this->error = "Username cannot be longer than 16 characters.";
                    break;
                case strlen($this->new_username) < 3:
                    $this->error = "Username cannot be shorter than 3 characters.";
                    break;
                default:
                    $stmt = $this->conn->prepare("SELECT username FROM accounts WHERE username = :username");
                    $stmt->bindParam(":username", $this->new_username);
                    $stmt->execute();

                    if ($stmt->rowCount() > 0)
                        $this->error = "Username has been already taken.";
            }
            

            if ($this->error == NULL) {
                $stmt = $this->conn->prepare("UPDATE accounts SET username = :username WHERE id = :id");
                $stmt->bindParam(":username", $this->new_username);
                $stmt->bindParam(":id", $this->getDetails("id"));
                $stmt->execute();

                session_regenerate_id(true);
                $_SESSION["user"] = $this->new_username;
                return true;
            }

            return $this->error;
        }

        public function updateBio() {
            if ($this->new_bio == $this->getDetails("bio"))
                return NULL;

            
            if (strlen($this->new_bio) > 150) 
                $this->error = "Bio cannot be longer than 150 characters.";

            if ($this->error == NULL) {
                $stmt = $this->conn->prepare("UPDATE accounts SET bio = :bio WHERE id = :id");
                $stmt->bindParam(":bio", $this->new_bio);
                $stmt->bindParam(":id", $this->getDetails("id"));
                $stmt->execute();

                return true;
            }

            return $this->error;
        }

        public function updatePassword($passwordConfirm) {
            if (empty($this->new_password)) {
                return NULL;
            } else {
                if ($this->new_password != $passwordConfirm)
                    $this->error = "Passwords don't match.";
            }

            if ($this->error == NULL) {
                $hashed_password = password_hash($this->new_password, PASSWORD_BCRYPT);
                
                $stmt = $this->conn->prepare("UPDATE accounts SET password = :password WHERE id = :id");
                $stmt->bindParam(":password", $hashed_password);
                $stmt->bindParam(":id", $this->getDetails("id"));
                $stmt->execute();

                return true;
            }

            return $this->error;
        }
    }
?>